Speed-controlling mechanism



June 23, 1925.

, 1,543,420 E. W. COOPER srazn cou'moLLma nzcmuxsn" Filed March 4. 19224 Sheets-Sheet 1 g INViNfOR A TTO R Y June 23, 1925.

1.543320 E. w. COOPER SPEED CONTROLLING IEGHANISI' Filed March 4. 1922 4Sheets-Sheet 3 June 23, 1925.

E. W. COOPER SPEED CONTROLLING IECHANISI Filed March 4. 1922 4Sheets-Sheet 4 5 m VENTOR Patented June 23, 1925.

PATENT m ELLIS w. ooornn, or NEW YORK, 1v. Y.

SPEED-CONTROLLING MECHANISM.

Application filed March 4, 1922.

To all whom it may concern:

Be it known that I, ELLIS W. COOPER, a citizen of the United States,residing at New York, in the county and State of New York, have madecertain new and useful Improvement in Speed-Controlling .Mechas nism, ofwhich the following is a specificatlon.

The invention relates to driving mechae nisms for machines and speedregulating devices therefor, and more particularly to such drivingmechanisms and to cooperating means for varying the speed ratio betweena' driving and a driven member.

Objects and advantages of the invention will be set forth in parthereafter, or will be obvious herefrom, ormay' be learned'by practicewith the invention; the same being realized and attained through theinstrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, constructions, arrangements,combinations and improvements herein shown and described.

The accompanying drawings herein referred to and constituting a parthereof, illustrate one embodlment'of the 1nvent1on a and together withthe description serve to explain the principles thereof.

Of the drawings:

Fig. 1 is an elevation of a mechanism embodying the invention;

Fig. 2 is a top plan corresponding to Fig. 1;

Fig. 3 is a longitudinal central vertical section taken substantially onthe line 3-3 of Figs. 2 and 4; and,

Fig. 4 is a transverse vertical section taken substantially on the lineli of Figs. 2.

and 8.

The principal object ofthe invention is to produce a simple and highlyefficient mech anism for variably regulating the speed of a drivenmember relatively to the speed of a driving member, and thereinproviding a very nice and accurate adjustment .of the speed ratiobetween the driving member and the driven member.

More in detail, and having in view the present preferred embodim nt, theprincipal object of the invention is very nicely andv accurately tovary, and thereby regulate, the speed ratio between a driving gear and adriven shaft so that with a constant or Serial No. 541,152.

practically impossible to have the pages of the two webs of exactly thesame size or exactly :in the same interrelation, and any such variationconstitutes a cumulative error which, with a constant or non-variablespeed of feeding the two webs, would soon bring them entirely out ofregister.

WVhere the present invention is applied to the driving mechanism for oneof the web rolls, it will be possible to impart the slight yet very niceand exact variation of speed to oneof' the roll feeds whereby the twowebs may be continuously associated in absolute registry one with theother. In this exemplary instance, the shaft may be a part of the webroll feed, whether this be a peripheral frictional feed or any otherkind of suitable feed mechanism. It will be clear that the invention isalso applicable to other kinds of mechanisms. v

In accordance with certain features of the invention, and as preferablyembodied, means are provided whereby the greater part of the drivingeffort orforce is positively supplied, and only the small var1a-- tionsfrom the normal speed are effected or compensated by'frictional means.Thereby the frictionally operated speed varying devices maybe'made verymuch smaller and more sensitive and a very much nicer and more precisegraduation of speed can be obtained and uniformly maintained.

In'the preferred embodiment, and carrying out the objects and featuresof the invention already broadly set forth, there are provided a drivinggear and a driven shaft, with gearing connecting the two to effect thedrive, together with means for controlling this connecting gearing tochange the angular relative speed of the driving gear and the drivenshaft.

This is preferably effected by imparting as desired or necessary plus orminus additional angular movement to some portion of l operating.

the connecting gearing. As already stated this is preferably effected byan auxiliary mechanism, which is likewise preferably a frictionalmechanism, one member of which is positively driven from either thedriven shaft or driving gear. It will be understood also that the shaftmay do the driving and that the gear may be driven, this being a meremechanical reversal.

It will be undestood that the preceding general description and thefollowing detailed description are exemplary and ex planatory of theinvention, and are not re strictive thereof; and that other features andobjects of the invention will be first set forth in connection with thefollowing detailed description.

Referring now in detail to the embodiment of the invention illustratedby way of example in the accompanying drawings, a driving gear 1 (whichmay optionally be the driven gear or driven member) has its hub 2loosely mounted for independent rotation on the driven shaft 3 (whichshaft may in turn be the driving member). This gear may be provided withexternal gear teeth 1 for receiving a driving force-from a driving gear(not shown). The shaft 3 is journaled in bushings 4 and 5, mountedrespectively in the frame members 6 and 7. Fixed to the inner face ofthe rim of the gear wheel 1 is an internal gear ring 10 and meshing withthe internal gear ring 10 (Figs. 3 and f) are a plurality of gearpinions 11.

The pinions 11 also mesh with a gear wheel 12, having a hub sleeve 13,which is fixed to rotate with the shaft 3 by a key 14. The gearedpinions 11 are journaled, respectively, on stub shafts 18, which arefixed to and project from an angularly movable or rotable member 19,which is preferably a worm wheel, having its hub 20 loosely journa-ledfor independent rotation on the sleeve 13, which it will be recalled isthe hub of the gear wheel 12, which gear wheel is fixed to the shaft 3.The worm wheel 19, it will be understood, is a part of the mechanism forvarying or controlling the speed ratio between the gear wheel 1 and theshaft 3.

According to certain features of the invention, the speed ratio varyingor controlling mechanism is preferably frictionally As embodied a conepulley 26 is fixed on shaft 3 to rotate therewith by suitable means,such as a key 27. Running in contact with the cone pulley 26 is ashiftable speed-regulating endless belt 28. The shifting mechanismtherefor, as embodied, comprises a spool or spool-like member 30, havingend flanges 31 and 32 at either side of the belt, to keep it in positionand guide it and to effect the speed changing movement thereof. Theseflanges are provided 11 be rotated with outwardly projecting heels 33and 34c, which engage with the reach 35 of the frame to prevent rotationof the spool.

In the embodied form of means for driving belt 28 to and fro, spool 30is internally apertured to receive the end of a shaft 36, which isrotatable within the spool, being held longitudinally in place by acollar 42 on the end of the shaft, and by a shoulder on the shaftagainst which the spool flange 32 abuts. Shaft 36 is screw-threaded intoa bushing 43, mounted in the frame piece 7 and correspondinglyinternally screw threaded. Suitable means are provided for rotating thescrew-shaft 36, such as a hand wheel or sprocket wheel 37 in onedirection or the other to slide the spool 30 and therewith the belt 28longitudinally or across the cone pulley 26.

Cooperating with cone pulley 26, is a cone pulley 44:, the belt 28running therebetween in the usual manner. Cone pulley 44 is splined on ashaft 45, to rotate therewith but has slight longitudinal movementthereon. Shaft a5 is journaled at l6 and 47 in the machine frame and isheld in place by collars 38 and 39. Cone pulley a4 is pressed intofrictional engagement with the belt 28 by a spring 47,

with which meshes a beveled gear 51, which latter is fixed on a shaft52. This shaft is journaled in brackets 53 and 54 integral with theplate 55, which is bolted to the frame reach 56. Fixed on shaft 52 is aworm 58, with which meshes the worm-wheel 19 already described.

The manner of operation of the mechanism just described is substantiallyas follows:

Assuming, as has exemplarily been done, that the gear wheel 1 is thedriving member, the gear wheel may be driven in any suitable manner, orby any suitable mechanism, and at any desired speed. The internal gearring 10, being fixed to the gear wheel 1 rotates therewith, and throughthe pinions 11 will impart rotation to the gear wheel '12 which is fixedto the shaft 3 to rotate therewith. Thereby a certain speed of rotationwill be imparted from the gear wheel 1 to the shaft 3, the speed ratioof the gear wheel and the shaft being dependent upon and determined bythe gear ratio of the gear ring 10, the pinions 11 and the gear wheel12, in a well known manner. This may be conveniently styled the normalspeed ratio of the driving member and the driven member.

It will be clear, however, that if the pinion in one direction or theother at a slightly greater or less speed, the gear to the gear wheel 1than the normal speed ratio just referred to. By rotating the screwshaft 36, the belt 28 may be moved along the cone pulley 26, either tothe left in Fig. 3 to increase the speed of the cone pulley 1 irelatively to that of pulley-26 or to the right in that figure todecrease the relative speed of the cone pulley 4A. This willcorrespondingly vary the rotational speed of worm wheel 19, and therebyimpart the requisite and already described subtractive or additiveangular movement to the worm wheel, and thus will correspondingly.increase or decrease the speed ratio of the gear wheel 1 and the shaft3.

From all the foregoing it will be understood that a mechanism has beenprovided realizing the objects and advantages here inbefore set forth,together with other objects and advantages; and further that depanturesmay be made from the exact structure shown and described, within thescope of the accompanying claims without departing from the principlesof the invention and without sacrificing its chief advantages.

lVhat I claim is 1. A speed varying and controlling mechanism,comprising a driven shaft, a driving gear freely rotatable on the shaftand having external gear teeth for receiving a driving force, and alsohaving internal gear teeth, a worm wheel loosely mounted. on the shaft,a planetary pinion mounted on the worm wheel meshing with the internalgear teeth on said gear wheel, a gear wheel fixed to rotate with theshaft and meshing with the pinion, a shaft perpendicular to the drivenshaft and having a worm meshing with the worm wheel, and connections forrotating the worm and worm wheel proportionately to the rotation of saidshaft.

2. A speed varying and controlling mechanism, comprising a driven shaft,a driving gear freely rotatable on the shaft and having external gearteeth for receiving a driving force, and also having internal gearteeth, a worm wheel loosely mounted on the shaft, a planetary pinionmounted on the worm wheel meshing with the internal gear teeth on saidwheel, a gear wheel fixed to rotate with the shaft and meshing with thepinion, a shaft perpendicular to the driven shaft and having a wormmeshing with the worm wheel, connections for rotating the worm and wormwheel proportionately to the rotation of said shaft, and means,cooperating with said connections, for varying the ratio of the rotationof the worm wheel to the shaft, as desired.

3. A speed varying and controlling mechanism, comprising a drivenshaft,a1driving gear freely rotatable on the shaft and having externalgear teeth for receiving a driving force, and. also having internal gearteeth, a worm wheel loosely mounted on the shaft, a planetary pinionmounted on the worm wheel meshing with the internal gear on saidgear-wheel, a gear wheel fixed to rotate with the shaft and meshing withthe pinion, 'a' worm meshing with the worm wheel, and a double-conevariable speed drive connected to the shaft and to the. worm wheel, forvarying the relative speed of rotation of thedriving gear and drivenshaft.

4:. A speed varying and controlling mechanism, comprising a fixedcasing, a shaft ex tending through the casing and journaled in oppositewalls thereof, a gear rotatably mounted on said shaft, a gear keyed tosaid shaft, a planetary gear meshing with the two aforesaid gears, aworm gear for driving the planetary gear, and means cooperating with theshaft, for driving the worm gear and planetary gear at different speedswith relation to the speed of the shaft.

5. A speed varying and controlling mechanism, comprising a fixed casing,a shaft extending therethrough and journaled in opposite walls thereof,a gear having external and internal gear teeth and journaled on saidshaft, a second gear fixed on said shaft,

a planetary gear meshing with the internal gear teeth of the first gearand with the second gear, a worm gear for driving the planetary gear,and means, cooperating with the shaft, for driving the worm gear andplanetarygear at different speeds with relation to said shaft.

6. A speed varying and controlling mechanism, comprising a fixed casing,a shaft extending therethrough and ournaled in opposite walls thereof, agear having external and internal gear teeth and journaled on saidshaft, a second gear fixed on said shaft. a planetary gear meshing withthe internal gear teeth of the first gear and with the second gear, aworm gear for driving the planetary gear, a second shaft journaled atits opposite ends in the casing, and substantially parallel to the firstmentioned shaft, means operatively connecting said second shaft with theworm gear, and means for drivin said second shaft at different speedswith relation to the first shaft.

7 A speed varying and controlling mechanism, comprising a fixed casing,a shaft extending therethrough and journaled in opposite walls thereof,a gear having external and internal gear teeth and journaled on saidshaft, a second gear fixed on said shaft, a planetary gear meshing withthe internal gear teeth of the first gear and with the second gear, aworm gear for driving the planetary gear, a second shaft, journaled atits opposite ends in the casing and arranged substantially parallel tothe first shaft, means operatively connecting said second shaft with theworm of the worm gear, and means Comprising two cones, respectivelyfixed to the first and second shafts, for driving the second shaft atvarious speeds with relation to the first shaft.

8. A speed varying and controlling mechanism comprising a driven shaft,a driving; gear loosely mounted thereon and having ternal gear teeth forreceiving a driving force, and also having internal gear teeth a gearfixed to the shaft, a planetary gear meshing With the two said gears, aWorm gear for rotating the planetary gear, a double-cone variable speeddrive for driving the Worm gear at different speeds, a friction beltlocated between the two cone members of the variable speed gear, andmeans including a threaded shaft for shifting the friction belt.

In testimony whereof, I have signed my name to this specification.

ELLIS V. COOPER.

